Mold form



J. D. ACKER mom) FORM March 9 1926. 1,576,291

Filed Sept. 18 1925 2 Sheets-Sheet 1 March 9,1926. 1,576,291

J. D. AcKER MOLD FORM Filed Sept. 18', 1925 2" Sheets-Shoot 2 Patented Mar. 9, 1926.

UNITED STATES PATENT OFFICE.

JAY n. .AGKLER, or NOBWALK, 0x110.

MOLD FORM.

ApplicationfiIed September 18, 1925. Serial No. 57,046.

ing is a full, clear, and exact description,

reference being had to the accompanying drawings.

Thisinventionis concerned with mold forms and more particularly, with mold forms for molding concrete vaults and the general object thereof is to provide a mold structure which can be rapidly assembled to receive the wet concrete, and thereafter be readily removed when once the concrete is set.

More specifically, my invention is directed to the provision of a novel form of top structure which may be fleXedto produce an arcuate surface on the material being molded and which maybe readily 'attached tothe mold in a leak-proof manner with a quickly detachable clamping means.

Other objects of my invention will hereinafter be set forth in the following description referring to the accompanying drawings illustrating a preferred form thereof. The essential characteristics are summarized in the claims.

In. the drawings, Fig. 1 is a perspective View of a mold structure embodying the novelfeatures of my invention; Fig. 2 is a cross-sectional elevation taken through the center of the mold substantially. along the line 22 of Fig. 1; Fig. 3 isan enlarged perspective detail of a corner structure of the mold walls; Fig. 4 is a perspective view of a removable pouringhopper forthe mold; Fig. 5 is a plan view of the top structure or base of the mold structure; Fig; .6is an en-v larged fragmentary perspective detail of one corner of the base structure of the mold; Fig. 7 is a view similar to Fig. 6 showing the mold structure of an opposite corner of the base; and Fig. 8 is a perspective view of the article molded.

Mold forms for the molding of concrete vaults and particularly thoseforms now in use for the molding of lid of concrete vaults embody a core structure mounted on a base and removable outer walls and a top-which may be stripped from the formed concrete before the concrete iscompletely set, whereby the article may be troweled and finished to remove and correct any irregularities incident to. the pouring of the concrete. Such mold forms usually embody a large number of bolts and clamps for securing the sides and end walls and the top together in a leak-proof manner. Due to the usual length of the article to be molded relative to its width, the top andside members frequently warp or buckle under the clamping action to causing deficient proportioningin the lid.

My invention contemplates the provision of a mold construction which may be rapidly removed from the pouredconcrete after it has solidified and before it'has completely set and the. characteristics of the members comprising the mold whereby this re1novability may be obtained, is such that the will have no tendency to warp or buckle.

The preferred forms of mold construction,

which I illustrate in the drawings, is particularly adaptable to the molding of a longitudinal members comprising the mold cover or lid having an arcuate top. ,As

shown in the drawings, the mold may comprise end walls 10 and side walls 11 removably mounted upon a base structure (see Fig. 5) comprising metal-lined longitudinal members'13 and 14 and transverse bottom members 15 and16. These members may be secured to transverse base members 18 and 19 disposed at the ends of the mold structure and to an intermediately disposed base member 20. These latter members ex tend or project from the sides of the base for a purpose to be hereinafter setforth.

Disposed within. the inner marginal boundaries of the bottom members 13, 14,

1.5 and 16, may be a core structure c'omprising longitudinal members 2 1 and 25 and top longitudinal members 26, resting upon end members 28. All of the core members are preferably covered by a metal, lining a 30, extending thereoven' The outer side" 'sl eet metal which maybe longitudinally reinforced in such manner as] to remain slightly flexible. The top structuremay. accordingly comprise longitudinally extending sheet metal members/l0 and 41 spaced apart to provide a pouringgate 42 ;the sheet T fl secured h r-etomad. othc at metal members ll) and 41 being reinforced by longitudinal strips 4A extending over the outside surface thereof. The strips and the sheet metal members may be-oarriedby flat transversely extending band members 15, 46 and 47. Angle members 48 may extend longitudinally along the, top of the closure structure adjacent the pouring gate and form flanges forthe pouring gate; A pouring hopper 50, .,s,h own in Fig. '4, may have .channehshaped: members; 5,1 spaced apart and secured to; the. bottom thereof to ride: upon the-angle members. 48. The lower longitudinal; edges of the metallic membersMl and ll immediately above. the side wall members 11 .maybev reinforced by band members- 4;5, {1.6 and 17. x

oafiord. Pr per c a p ng action or bringing the cover into. leak proof v C ntact wi-ththewtop. surfaces. ot' the end walls and side walls 10 :and 11 of themold body, I prefer-ta form extensions on the. transverse straps 45, 1.6, and 417 which on, onev end may comprise extension hars l fif, 4 6, 4TB respec tively, and which, n'iay have their lower ends thereof bent at right anglesto. form hinge; portions engaging sockets 60 formed on platejnaembers 61 secured to the. back ends o-fthe, transverse basemeinbers 18, 19

and- 20, Thefor-Wa1'd,.-ends.oi the strips 45, a6, and 4;? may have similar extension bars 45"; 416"; and 47* respectively formed there: on which may be threaded" toafiord attachment for adjustable clamping membQ fS 70; The transverse members 18,. 19V and 2.0 are suitably slotted as at 73 andreinlforced. by metallic plates. 71 and 72 vat the forward ends thereof to, afford proper engagement er the cla pi g m m rs and the threaded extensions oi the transverse bar 7 members. If desired, adjustable members in the-iorinogfi nuts 74: may be mounted on th th ead d ends t he ra rs rbers to limit the.- amount. 0t clamping mouement'o t the, tr 'n rer ba memb r hich; may b K attest d-hat o amping embers/7.0,

Tillie. forwardends oi} the transrerse, base memb rs .8, -9 an a e Pto idei with plates/E1; and-:'7;2 asshQWQDY-in Figs. 3 and 6,. T e ai en- Porti s Qf the uppe p ates. 1

: extend-. upwar ly n ghte sl t tbebes m mb rs, the losely e ging and sun: porting the side wallll. Eig fl showsthe plates 61, attached t theiiea ward; en of; thea ememb s 1.8., 19 and. 2.0 with. th inner P-Qrti n x en ing upw rdly a ig t ngles o base. mem e hus facing and sepp r ingith sidew llw he n 11p.- right'p s ql z f t epl t sfi and '11 a he mi dle-base. memb r i 20 m high r. and wide: an. the ikeep r ons. of the. plates 6. and oaths bas me er nce the .tie ds ead. op eke. the str in. of supporting the ends of the walls 11. The

members 18 and 19 may be provided with metal plates 18? and 19 which may abut similar plates 10" secured to theend wall members, the plates serving to accurately gauge the position of the end wall members and to. oppose any buckling or warping thereof.

\vhenigtis desired to..p.rov-i,d;e the lid L, (see Fig. 8) with handles 90. and a metallic reiniorcement 95, the reinforcing irame work 95 may be suspended in the mold cavity by extensions of the; handles and! the handles may be carried by: the top, closure structure in a welglsknown. manner;

From the foregoing. description of the preferred: torus o l? my'ilwention it will: be apparent that the corners of the mold are eliicientl-y closed by the clamping. action of two rods 80, one at each end oi tlie.1no-l(l; that the longitudinal members comprising the side walls arepreveuted from warping outwardly at the bottom by the action of. the plates positionedon thev transverse members. It, will also be. apparent thatthe closure structure ess! be elfic ently p a ed in e led relation with the. top edges 01*; the end members lOa n dq side, members ll, comprising the walls. of, the molds by the clamping action of the clamp. members.. 7.0 which place tension pon the tran vers -bar 4.5, and .7,

thus bringing the under su-rface of th'e ,clo-

sure. structure into intimate contact with the s e Wal -S11! long e t p e ges hereof- If it is desiredto remove the outer portions of t e m l these'c mnm mbersflll y be unscrewed and:the top, swung to thedot. and dash pos tio 10Wn-'i- .Fig,-; 2 and e side and end wall members may: thereafter be, re; moved. by releasing thev two clamp bars 80; In. t e pmz i ar ij r i mold ructure which I disclose, it will beevident that the ngitu inal memb rs may. e, s ic n ly .rcin orcedi theut constructing h r movable par s of h mold in, ac mbe me mann r, and the fmished productwhile. in the green state will require but little troweling of its ur ces;t ..sn1o, i11. the some.

I claim: 7 In a mold: te m. f

the characterdes ribed, the ombination of. a or tr c ure,

- I m ld term of he elm-re or rl er hedb he. ombination offa core structure, emovable s dle, and. en .wal members mounted upo'n a'base carrying the core structure and. a flexible metallic top structure adapted to be arcuately supported by the end and side wall members.

3. In a mold form of the character de- 7 scribed, the combination of a core structure,

removable side and end wall members mounted upon a base carrying'the core structure and a flexible swingable top structure arcuately supported by the end and side Wall members. i

4. In a mold form the combination, of a base structure, a core structure mounted on the base structure, end members and side members mounted upon said base structure, said end members having the tops thereof arcuately formed, and a flexible sheet metal structure extending across the top and side members, said sheet metal structure being removably secured to the base structure.

5. In a mold form the combination of a base structure, a core structure mounted on the base structure, end members and side members removably mounted upon said base structure, said end members having the top thereof arcuately formed, separable means holding the side and end members in relative position and a top structure extending across the top and side members, said top structure being removably secured to the base structure.

6. In a mold form the combination of a base structure, a core structure mounted on the base structure, end members and side members removablv mounted upon said base structure and a top structure extending across the top and side members, said top structure being swingably secured to the base structure.

7 In a mold for forming concrete vaults, the combination of a base structure, a core structure mounted upon the base structure, side and end wall members and a flexible metallic mold closing structure surmounting the sides and end wall members of the mold and having a pouring gate formed along the top thereof.

8. In a mold for forming concrete vaults, the combination of a base structure, a core structure mounted upon the base structure, removable side and end wall members, cross bars clamping said wall members in relative position and a mold closing structure surmounting the side and end Wall members of the mold having a pouring gate formed along the top thereof.

9. In a mold for forming concrete vaults, the combination of a base structure, a core structure mounted upon the base structure, side and end walls removably clamped together and a flexible metallic mold closing structure surmounting the sides and end walls of the mold member and positioned in compressed relation thereto.

10. In a mold of the character described, the combination of side and end Walls, said end Walls being arcuately formed at the top thereof, a base structure including trans verse members positioned beneath the end walls of the mold and intermediate the end 'alls, a top closurestructure hingedly connected to the transverse members and means included in said top structure for drawing the top structure to intimate contact with the side and end Walls thereof.

11.In a mold of the character described, the combination of side and end Walls, said end walls being arcuately formed at the top thereof, ,a base structure including transverse members positioned beneath the end walls of the mold and intermediate the end Walls, and a top closure structure hingedly connected to the transverse members 12. In a moldof the character, described,

the combination ofside and end walls,

means for clamping the walls in relative position, .said end walls being arcuately formed at the top thereof, a base structure including projecting members extending outwardly from the side Walls of the mold, and I a top closure structure hingedly connected at one side of the mold to the transverse members and at the other side by clamping means.

13. In a mold-of the character described, the combination of a box-like structure having a" bottom structure, side andend walls, said end and side walls being removable from the bottom structure and a top closure COmPIisiIlg reinforced, sheet metal members and means associated therewith for removably attaching said sheet metal members to the bottom structure of the mold.

14. In a mold of the character described, the combination of a bottom structure, side and end'walls removably mounted thereon, cross bars clampingly joining the side Walls and the end walls, said end walls having the top edges thereof arcuately formed, a closure for the top of the mold comprising a flexible metallic structure, having transverse members hingedly connected to the mold structure at one side and removably connected to the mold structure at the other side.

15. In a mold of the character described,

the combination of a box like structure hav-' ing a bottom structure, side and end walls, said end and side walls being removable from the bottom structure, there being gage plates on the bottom structure for positioning the side and end walls and a top closure comprising reinforced sheet metal members and transverse bars secured thereto and means associated with the bars for removably maintaining said sheet metal members in contact with the top edges of the end and side wall members.

16. In a mold of the character described, the combination of a bottom structure including transversely projecting members, I

side and end walls removably mounted iao sidewalls and the end Walls,v said end Walls.

ha ving the top edgesthereof arcuately termed a closure for the top of the mold;

comprising a flexible metallic structure hay ing a longitudinally extending pouring ate and including transverse bar mem ers hingedl-y connected to the projecting members at one side 0t? themold and elampingly connected to. the projecting members at the other side of the mold;

l7.v In a mold of the characterdescribed, the combination of a box-like struoturehaving a bottom including laterally projecting memhers, side and end Walls removably positioned thereon, said end and side Walls being freely set on the bottom structure and a top closure comprising reinforced sheet metal members and means associated therewith for forcing said sheet metal members i'ntointimate contact With the top edge of the side and end members and thereby maintaining said members in contact with the bottom structure.

In testimony whereof, I hereunto afiix my signature.

JAY D. AGKER. 

